EP3381877B1 - Plaque de verre de securite coloree et procede de production - Google Patents

Plaque de verre de securite coloree et procede de production Download PDF

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Publication number
EP3381877B1
EP3381877B1 EP18165237.1A EP18165237A EP3381877B1 EP 3381877 B1 EP3381877 B1 EP 3381877B1 EP 18165237 A EP18165237 A EP 18165237A EP 3381877 B1 EP3381877 B1 EP 3381877B1
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EP
European Patent Office
Prior art keywords
glass
coloured
layer
paint
safety
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18165237.1A
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German (de)
English (en)
Other versions
EP3381877C0 (fr
EP3381877A1 (fr
Inventor
Ferruccio Bresciani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omni Decor Srl
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Omni Decor Srl
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Publication date
Application filed by Omni Decor Srl filed Critical Omni Decor Srl
Publication of EP3381877A1 publication Critical patent/EP3381877A1/fr
Application granted granted Critical
Publication of EP3381877C0 publication Critical patent/EP3381877C0/fr
Publication of EP3381877B1 publication Critical patent/EP3381877B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/3405—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of organic materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/38—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
    • C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
    • C03C2217/485—Pigments
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/72—Decorative coatings

Definitions

  • the present invention relates to a safety coloured glass sheet and to its manufacturing method.
  • Sheet glass or flat glass is a widely used material in various fields, for example in building/architecture and interior design.
  • US-5019440 discloses a decorative glass or plastic plate comprising a primer layer of a light-permeable polyurethane resin, a transfer-printed layer of a printed image formed of an ink containing a pigment and a binder, and a cured resin layer, these layers being formed consecutively on one surface of a light-permeable glass plate.
  • US-200119772 describes a method for printing ink on a substrate comprising the steps of coating a glass substrate with an adhesion promoter, depositing one or more layers of ink on the coated substrate, and laminating the imaged substrate.
  • the substrate can be a glass substrate
  • the adhesion promoter can include a silane material, powder coating, organophosphate primer suspended in isopropanol.
  • US-2015225285 describes a process for adhering a layer of organic paint to the surface of a glass sheet, and the products produced thereby. The process comprises applying a layer of a water-based silicate paint to the surface of the glass sheet, heating to cure the paint, forming the glass sheet into a shape, sensitizing the water based paint with a layer of silane material, applying a layer of organic paint over the layer of sensitized water-based silicate paint, and curing the organic paint to provide organic paint adhered to the glass surface.
  • coloured glass is often required.
  • the use of mass coloured glass, i.e. in which the colour is generated by the presence of metal oxides in the chemical composition of the glass, is normally limited to particular uses, such as the typical lead-bound glass panels of religious sites or the glass for antique and traditional doors.
  • the application of the paint aims to make the sheet coloured, or in any case no longer transparent or translucent, to use it as a coloured coating while maintaining the high surface gloss typical of a glass surface and at the same time ensuring that the colour is not scratched or nicked (the colour being on the face to be glued to the wall).
  • the glass sheets of the type mentioned herein have excellent aesthetic characteristics, given by the combination of the transparency of the glass and the applied colour, and maintain such characteristics over time.
  • the glass used to make this type of coloured glass is normally extra-clear glass, namely of a particularly white colour due to the very low or almost zero amount of iron oxides in the glass composition mixture.
  • face 1 is the one on the side of the observer, whereas the opposite face is called “face 2”.
  • the glass thus obtained can have various applications in current interior decoration as cladding of cabinets or kitchens, interior doors, tables, or as a wall cladding in commercial environments.
  • sheets have standard dimensions, e.g. a width of 3210 mm and a length ranging from 2250 mm to 2600 mm, and a thickness generally ranging from 4 mm to 12 mm.
  • the usual size of the sheets affects the use of this type of glass, thus limiting it to glassworkers that are able to move and cut the sheets to size and perimetrically grind the obtained pieces.
  • the final measure will be the one requested by the end users of the glass, namely, e.g. the producers of kitchens or furniture on whose doors the glass will be applied, or the decorators requiring a wall cladding for commercial environments (hotels, shops, etc.).
  • the coloured paint can be applied by means of different industrial painting systems: in general, all processes suitable for painting large-sized sheets can be used, e.g. using glazing machines, roller machines, spraying machines, screen-printing machines, etc.
  • the used paints are e.g. water-based paints, which are first flashed off and then oven-dried.
  • the glass thus produced cannot be subjected to temperatures exceeding 200°C, because the organic paint layer would be irreparably compromised by the modification of fundamental parameters such as colour, adhesion or surface appearance.
  • the tempering process is a known way to increase the mechanical strength of the glass: in fact, the tempering usually increases about four times glass resistance, if compared to a normal or annealed glass.
  • the tempering process is carried out on the piece, which has been cut into the final size and ground.
  • the present invention relates to a glass sheet and to its manufacturing method as essentially defined in the annexed claims 1 and 8, respectively, as well as, with regard to the preferred additional features, in the dependent claims.
  • the sheet A has a size ranging from 3210 x 2250 mm to 3210 x 2600 mm, and a thickness ranging between 4 and 12 mm.
  • the sheet A may have a size different from the one indicated herein by way of example.
  • the sheet A has a substantially flat sheet body B with a first face 1 and a second face 2, plane and parallel and opposite one another; the face 1 is intended to be turned, in use, towards the users/observers; the face 2 is intended to be arranged on an outer support surface, e.g. a wall (if the sheet A is used as a wall cladding) or a surface of a piece of furniture or any other furniture item.
  • an outer support surface e.g. a wall (if the sheet A is used as a wall cladding) or a surface of a piece of furniture or any other furniture item.
  • the sheet body B is a non-stratified monolithic body, and the sheet A therefore consists of a single layer of glass formed by the sheet body B.
  • the sheet body B is made of an extra-clear glass with a low or reduced iron oxide content, so as to have a light transmission of at least 90% and preferably at least 91%. It is however clear that the sheet body B may also be made of another type of glass, e.g. a clear glass.
  • the face 2 is provided with a coloured paint layer C, applied on the face 2 to be coupled to the support surface and directly in contact with the glass on face 2.
  • the layer C is made of coloured paint, e.g. an organic water-based paint or a powder paint or an inorganic paint, e.g. a ceramic enamel.
  • the coloured paint is evenly applied on the face 2 in liquid form, e.g. by means of a glazing machine, a roller machine, a spraying machine, or any other.
  • the coloured paint is a powder paint, which is applied in solid form, e.g. by means of a spraying machine.
  • the layer C is subjected to a flash-off step of about 5-15 minutes, e.g. about 10 minutes; and to an oven-drying step, e.g. in an infrared radiation oven.
  • the paint is dried for about 5 to 10 minutes, e.g. about 8 minutes, at a temperature of 80-120°C, e.g. about 90°C.
  • the face 2 is further provided, upon the layer C and in direct contact with the layer C, with a protective layer P, made of a safety resin.
  • the safety resin is evenly applied on the face 2, upon the layer C, in liquid form by means of a spraying process or a glazing or roller deposition, a screen-printing process, or a different process.
  • the safety resin is applied after having applied the coloured paint layer C to stain the glass and upon the layer C.
  • the sheet A is then made by applying two layers P, C made of different materials, both applied on the face 2 of the sheet body B and one upon the other.
  • the coloured layer C directly applied on the face 2, is formed by coloured paint and has a decorative function
  • the protective layer P applied upon the coloured layer C, is formed by the safety resin and has a safety function.
  • the protective layer P keeps together the pieces of glass in case of accidental breakage of the sheet A, thus avoiding a dangerous detachment and falling of sharp glass fragments.
  • the protective layer P is made of a polymeric resin, in particular a preferably elastomer polyurethane resin.
  • the resin is flashed off (if necessary) and dried analogously to what done for applying the paint layer C.
  • the layer P is subjected to a flash-off step, e.g. in a hot air oven or in an IR radiation oven, indicatively for about 5 minutes, e.g. for about 2 minutes. Then, to achieve the so-called "out of print” condition, the resin is dried in free air at a temperature of e.g. about 25°C for about 120-180 minutes.
  • the flash-off (if necessary) and drying can also take place in other modes and operating conditions (times and temperatures), e.g. in a hot air tunnel or even simply at room temperature.
  • the resin is preferably applied in two coats, thus reaching a final thickness of the (wet film) layer P ranging from about 300 to about 500 microns.
  • the resin applied in the layer P is transparent, so as not to alter the colour given by the paint layer C when the sheet A is observed from the side of the face 2.
  • the resin may not be transparent, being for example opaque, semitransparent, coloured, etc.
  • the glass sheet A according to the invention has also proved to possess high safety features, passing the tests required by the UNI EN 12600/2004 standard (pendulum test).
  • This standard defines the criteria for measuring the resistance and breaking behaviour of a sheet when it is hit by a soft body simulating the impact with a person.
  • the standard classifies the glass sheets in order to evaluate the risk of cutting wounds and to determine their ability to contain the fragments resulting from the impact, or the sheet crossing resistance.
  • the glass object of the invention is classified in class 2(B)2, which is the one of laminated safety glass.
  • the presence of the protective layer P does not affect the possibility of cutting the glass in the desired size by means of traditional techniques.
  • the sheet A can be cut without problems, since after a traditional engraving performed on the face 1, the layer P splits during a subsequent break-up operation without requiring any special precaution.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Laminated Bodies (AREA)

Claims (9)

  1. Procédé pour fabriquer une feuille de verre de sécurité colorée (A), comprenant les étapes de : préparation d'un corps de feuille de verre pratiquement plat (B) ayant une paire de faces parallèles et sur des plans opposés (1, 2) ; application sur une première face (2) d'une couche de peinture colorée (C) faite d'une peinture colorée et directement en contact avec le verre sur ladite première face (2) ; et application sur ladite couche de peinture colorée (C) d'une couche protectrice (P) faite d'une résine de sécurité, qui adhère à ladite couche de peinture colorée (C), dans lequel la résine de sécurité est appliquée uniformément sur ladite couche de peinture colorée (C) sous forme liquide en atteignant une épaisseur de film humide située dans la plage allant d'environ 300 à environ 500 micromètres, et la couche protectrice (P) est soumise à une étape d'évaporation et à une étape de séchage, de façon que le corps de feuille (B) soit maintenu solidaire dans le cas d'un choc, ce qui évite ainsi la formation de fragments de verre.
  2. Procédé selon la revendication 1, dans lequel le corps de feuille (8) est produit avec une largeur d'environ 3210 mm et une longueur située dans la plage comprise entre environ 2250 mm et environ 2600 mm, et une épaisseur située dans la plage comprise entre environ 4 et environ 12 mm.
  3. Procédé selon la revendication 1 ou 2, dans lequel la couche protectrice (P) est faite d'une résine élastomère.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la couche protectrice (P) est faite d'une résine de polyuréthane.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la résine de sécurité est pratiquement transparente, moyennant quoi la couche protectrice (P) est aussi pratiquement transparente.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel le corps de feuille (B) est fait d'un verre extrêmement transparent ayant une teneur faible ou réduite en oxydes de fer et ayant une transmission de lumière d'au moins 90 % et de préférence d'au moins 91 %.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel la couche de peinture colorée (C) est faite d'une peinture en poudre ou d'une peinture à l'eau organique.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel la couche de peinture colorée (C) est soumise à une étape d'évaporation ; et à une étape de séchage.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel la peinture colorée est uniformément appliquée sur ladite première face (2) sous forme liquide ou solide.
EP18165237.1A 2017-03-29 2018-03-29 Plaque de verre de securite coloree et procede de production Active EP3381877B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000034726A IT201700034726A1 (it) 2017-03-29 2017-03-29 Lastra di vetro colorato di sicurezza e suo metodo di fabbricazione

Publications (3)

Publication Number Publication Date
EP3381877A1 EP3381877A1 (fr) 2018-10-03
EP3381877C0 EP3381877C0 (fr) 2023-12-27
EP3381877B1 true EP3381877B1 (fr) 2023-12-27

Family

ID=59700040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18165237.1A Active EP3381877B1 (fr) 2017-03-29 2018-03-29 Plaque de verre de securite coloree et procede de production

Country Status (2)

Country Link
EP (1) EP3381877B1 (fr)
IT (1) IT201700034726A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019440A (en) * 1987-11-18 1991-05-28 Toyo Ink Manufacturing Co., Ltd. Decorative plate
US6277492B1 (en) * 1998-07-06 2001-08-21 Visteon Global Technologies, Inc. Providing organic paint on glass to match automotive body color
US9724727B2 (en) * 2014-02-13 2017-08-08 Corning Incorporated Methods for printing on glass

Also Published As

Publication number Publication date
EP3381877C0 (fr) 2023-12-27
EP3381877A1 (fr) 2018-10-03
IT201700034726A1 (it) 2018-09-29

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